4 Flute High Hardness Solid Carbide Flat End Mill, 68°, for Hardened Mold Steel, CNC End Mills

4 Flute High Hardness Solid Carbide Flat End Mill, 68°, for Hardened Mold Steel, CNC End Mills. Unequal helix design for vibration reduction. U-groove for smooth chip removal. 4-flute for high-efficiency dynamic milling. coating, high wear resistance & long service life. Suitable for stainless steel and alloy materials. Precisely ground cutting edge, sharp cut & fine surface finish. High-strength tungsten carbide substrate, chipping resistant. Large core diameter to improve tool rigidity. Low cutting resistance to reduce cutting heat. Strict tolerance, stable performance for mass production.